Stop-valve



(No Model.)

C. A. SULZMAN.

STOP VALVE.

110.431,082. Patented'July 1, 1890.

Snom/Mao@ Tvs UNITED STATES PATENT OEEICE.

CHARLES A. SULZMAI, OF VATERFORDLNEWv YORK.

STOP-VALVE.

SPECIFICATION forming part of Letters Patent No. 431,082, dated July 1, 1890.

Application filed October 18, 1889- Serial No. 327,418- (No model.)

T0 all whom t may concern.-

Be it known that I, CHARLES A. SULZMAN, a citizen of the United States, residing at Vaterford, in the county of Saratoga and Statev of New York, have invented new and useful Improvements in Stop-Valves1 of which the following is a specification.

This invention relates to stop-valves of that class in which a pair of vertically-movable gates are arranged to operate by means of a vertical screw-threaded stem or rod, and in which means are employed for forcingthe said gates apart laterally and into contact with their seats.

My invention consists in certain improvements in the construction of said valves, whereby a combined vertically-sliding and latorally-partin g movement of the gates is avoided, by which the construction is simplified, and by which the operation is rendered certain and effective, as will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings hereto annexed, Figure 1 is a vertical sectional View of a valve embodyin my improvements, showing the valve open. Fig. 2 is a perspective view showing the gates and the operating mechanism separated for the purpose of illustrating the invention more clearly. Fig. 3 is a vertical sectional view showing the valve closed.

Like numerals of reference indicate like parts in all the figures.

1 designates the valve-casing, which in this instance is shown as being T-shaped, one of the arms being provided with a plug 2, which maybe adjusted either in one of the vertical arms 3 or in the elbow Il of the valve-casing, which may therefore at will be used for a straight-way or for an elbow valve. The valve-Casin g is constructed with the upwardlyextending chamber 5, having a cap 6, through which extends the valve-stem 7, which is journaled in said cap, and provided with .a iiange 8 to prevent it from being displaced vertically in the latter, an exteriorly-serew-threaded disk 9 being arranged within a flange 10, extending upwardly from the cap 6, to prevent the tian ge 8 from moving upwardly. The flange 10 is provided at its Lipper end with a cap or cover 11, having an opening for the passage of the upper end of the valve-stem 7,

which is provided with ahand-wheel 12. The cap 6 and cover 1l may be provided with packing 13 for the purpose of making tight joints. 55

The inner ends ot the laterally-extending Y arms 3 3 .of the valve-casing are ground to forni seats 14 for the circular gates 15 and 1G, which are adapted to move upwardly into the chamber 5, which extends upwardly from the 6o valve-casing. The inner end of the elbow ft of the valve-casing is provided with shoulders or recesses 17 to support the gates when the latter are in a lowered or closed position.

18 designates a yoke having an upwardly- 65 extending socket 19. The said yoke and socket are provided with a vertical interiorlyscrew-threaded perforation 20,through which extends the lower screw-threaded end of the valve-stem 7. It is obvious that by rotating 7o the said stem the yoke 18 will be caused to travel upwardly or downwardlyin the easing, according to the direction of rotation.

The circular gate 15 is provided on its inner side with a segmental recess 21, which forms a bearing, in which is pivotally mounted the inner end of a tongue 22, which extends transversely through the yoke 18. The outer end of the tongue 22 is beveled or wedgeshaped, as will be seen at 23, and rests in a So Correspondingly-beveled recess 24 in the inner side of the gate 16. The tongue 22 is provided on its upper and lower sides with transverse ridges or ribs 25, adapted to engage the upper and lower ends of the yoke. The tongue 8 5 22 is also provided with a vertical opening or perforation 26 for the passage of the lower screw-threaded end ot' the valve-stem 7, said opening 26 being of sufficient diameter to prevent its Walls from coming in contact with the 9o valve-stein.

The operation of my invention will be readily understood from the foregoing description, taken in connection with the drawings hereto annexed. When by rotating the valve-stein the yoke 1S is caused to travel in an upward direction, it carries with it the tongue 22, which in turn engages the gates, which are. thus moved upwardly into the chamber 5 of the valvecasing, thus opening the valve. roo When the valve-stein is rotated in the opposite direction, the gates 15 and 1G will drop down until they rest upon the shoulders 17, when by continuing the operation of the Valvello and the downward movement of said gateslhas completely ceased. Friction and wear upon the faces of the gates are thereby avoided, and leaking of the valve resulting-v from such wear is prevented. It is also unnecessary to make provision in the valve-casing for any further downward movement of the gates in order to compensate for wear, as has been customary in this class of valves as heretofore constructed.

Having thus described my invention, what I c1aim, and desire to secure by Letters Patent, i

1. The combination, with the valve-casing having laterally-extending arms, the inner ends of which are provided with seats, of the circular gates provided, respectively, with a segmental and a beveled recess in their inner faces, a tongue mounted pivotally in the said v segmental recess and having a beveled end engaging the beveled recess of the opposite' gate, and a vertically-m ovable yoke inelosing and carrying` the said tongue, substantially as set forth.

2. The combination of the valve-@asin g havi-n g the opposite'lyextendin g lateral arms proi vided with seats at their inner ends, the rof tary Vvalve-'stem screw-threaded at its lower end, the yoke having an interiorly-threaded perforation adapted to travel vertically upon said valve-stem, the tongue mounted in said yoke and having a beveled end, and the gates mounted upon said tongue, one of said gatesv -being provided with a beveled recess to engage the beveled end of the tongue, substantially as set forth.

3. In a stop-valve, the combination, with the vertically-movable yoke, of the tongue mounted in said yoke and provided with ridges on its upper and lower sides to engage the said yoke and a beveled or wedge-shaped end, and the gates mounted upon said tongue, one of said gates being provided with a beveled recess to engage the beveled end of said tongue, substantially as set forth.

4. The combination of the valve-casing having the seats 14 and the shoulders 17, the rotary valve-stem having screw-threaded lower end, the yoke arranged to travel vertically upon said valve-stem and having the vertically-perforated tongue provided with a beveled end, and the gates mounted upon said tongue, one of said gates being provided with a beveled vrecess to engage the beveled end of the latter, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

CHARLES A. SULZMAN,

Witnesses:

CHARLES H. COLE, EDGAR C. McKALLoR. 

